U5020M Datasheet, PDF (5/8 Pages) TEMIC Semiconductors – Digital Window Watchdog Timer

U5020M
Figure 7 shows the switch-over from the short to the long
watchdog mode. The wake up signal during the enable
time, t₅, activates a reset pulse, t₆.
The watchdog can be switched back from the long to the
short watchdog mode with a low potential at the mode pin
(Pin 12).
Reset out
t₆ t₁
Pin 10
Wake-up
Mode
Trigger
t₄
t₂
Pins 3 to 8
t₅
Pin 12
Pin 11
Enable
Figure 7. Pulse diagram of the long watchdog time
95 10640
Pin ⁹
Application Hint
In order to prevent the IC from an undesired reset output signal which may be caused by transcients on the supply under
certain conditions a pc board connection from Pin 2 to GND is strongly recommended.
Absolute Maximum Ratings
Supply voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Output current}
Parameters
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Input voltage}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Ambient temperature range}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Storage temperature range}
Symbol
Value
Unit
V_DD
I_OUT
"6.5
2
V
mA
V_IN
–0.5 V to V_DD + 0.5 V
V
T_amb
–40 to +85
°C
T_stg
–55 to +150
°C
Thermal Resistance
ÁÁ_JÁÁ_unctÁÁ_ionÁÁ_ambÁÁ_ienÁÁ_t ÁÁÁÁ^ParaÁÁ_SmOet1ÁÁ^e6rsÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ^SyRmÁÁ_thJ^b_A^oÁÁ^l ÁÁÁÁÁÁÁÁ^V1a6lu0ÁÁ^e ÁÁÁÁÁÁÁÁ_KUÁÁ_/nWitÁÁÁÁ
TELEFUNKEN Semiconductors
5 (8)
Rev. A3, 27-Feb-97
Preliminary Information